Galaxy S26 Ultra vs 15 Ultra

Phone 1

Phone 2

Winner

Samsung Galaxy S26 Ultra

Lifespan decides this one: the Galaxy S26 Ultra is supported until Mar 2033 at $13.62 per month of safe use, while the 15 Ultra runs out in Mar 2030 ($30.40/month). On a which-lasts-longer question, that's not a tie — it's the whole answer.

Value Score: Galaxy S26 Ultra 77 · 15 Ultra 65 — methodology

The lifespan decider

When specs are close, support length decides it — this is what each phone costs per month of safe use.

Samsung Galaxy S26 Ultra $1099

Safe to buy$13.62/mo

2026◆ Buy-by Mar 20312033

Xiaomi 15 Ultra $1350

Safe to buy$30.40/mo

2025◆ Buy-by Mar 20282030

Category by category

Display

Galaxy S26 Ultra 10015 Ultra 100

Both displays are effectively the same class.

Performance

Galaxy S26 Ultra 10015 Ultra 98

Performance is a wash — same chip tier.

Camera

Galaxy S26 Ultra 9615 Ultra 96

Camera systems are comparable on paper — pick by sample photos.

Battery

Galaxy S26 Ultra 8015 Ultra 88

5,410mAh vs 5,000mAh — the 15 Ultra lasts longer between charges.

Software longevity

Galaxy S26 Ultra 9615 Ultra 53

The Galaxy S26 Ultra is supported until Mar 2033 — 36 months longer than the 15 Ultra.

Value

Galaxy S26 Ultra 7715 Ultra 65

Overall value goes to the Galaxy S26 Ultra at $13.62 per month of safe use.

Full spec table

Spec	Galaxy S26 Ultra	15 Ultra
Price (street)	$1099	$1350
Display	6.9-inch Dynamic LTPO AMOLED 2X, QHD+, 1–120Hz, up to 2600 nits, with anti-reflective Privacy Display	6.73-inch 2K (1440×3200) LTPO AMOLED, 1–120Hz, up to 3200 nits peak
Chipset	Snapdragon 8 Elite Gen 5 for Galaxy	Qualcomm Snapdragon 8 Elite (3nm)
RAM	12GB	16GB
Storage	256GB/512GB/1TB	512GB/1TB
Battery	5,000 mAh	5,410 mAh
Charging	60W wired, 25W wireless	90W wired, 80W wireless
Rear cameras	200MP main, 50MP ultra-wide, 10MP telephoto 3x, 50MP telephoto 5x periscope	50MP main, 50MP ultra-wide, 50MP telephoto (70mm floating), 200MP periscope telephoto
Dimensions	163.6 × 78.1 × 7.9 mm	161.3 × 75.3 × 9.35 mm
Weight	214 g	226 g
Water resistance	IP68	IP68
Supported until	Mar 2033	Mar 2030

Galaxy S26 Ultra full verdict →15 Ultra full verdict →Longevity master board →

Scores and verdicts are computed from our verified database — see exactly how. Specs from manufacturer documentation; prices reflect major US retailers.